Source:
Ritual
and Belief in Morocco:, Volume 1, 1926, by Edward Westermarck p. 465
"The
eye is often represented in the form of a triangle. Fig. 102 ... But if the eye
is thus conventionalised into a triangle, we may suppose that the two
intersecting triangles with a small round figure in the centre are a
conventionalised pair of eyes with a common pupil. This figure, called hatem
slimaniya sdasiya is very prevalent. It occurs, for instance, on Moorish
coins Fig. 103, and, drawn on a paper and provided with inscriptions from the
Koran, it is used as a charm against the evil eye. Sometimes a small
"eye" is added outside each point of the triangles, as is shown by
Fig. 104 representing a charm which is used at Fez".